Load Management // CEO Column February 2020

Photo of Dan Carlisle

Daniel Carlisle
President/CEO

We are always looking for ways to help our members save energy and money. Todd-Wadena Electric Cooperative uses programs and incentives to promote the use of electricity during off-peak hours—when it costs less. We do this through a process called load management.

Load management refers to a system that matches electricity supply with demand. Think of the electrical grid as a highway with rush hours at certain times (such as hot summer afternoons) when power supplies are stretched to their capacity. These periods of high demand cause spikes in power costs. Load management allows us to adjust participating members’ usage patterns to a different time, reducing the strain on an overloaded system.

Our power supplier, Great River Energy (GRE), determines when a control event will take place. By monitoring conditions over their entire system, as well as the price of electricity on the energy market, they control the load when it is most beneficial to members. GRE is able to purchase off-peak energy at a lower cost, generating savings which TWEC, in turn, can pass on to our members.

TWEC has load management programs for irrigation, dual fuel, water heaters, and commercial/industrial accounts that enroll. Control is managed with demand response units installed at members’ locations. These units listen for commands and control when needed. Currently we use radio frequency (RF) demand response units, which means the commands to control the system are sent via a radio frequency. This method has issues as commands are sometimes not received due to largely forested areas, remote fields, or weather conditions. A newer method for sending commands is now available via power line carrier (PLC) demand response units. Here the commands travel through the power line, just like electricity, so the error percentage is significantly decreased.

In 2020, TWEC will be conducting a pilot program installing 100 PLC units, which will utilize this new and improved technology. If everything goes as planned, in 2021, we will roll out a full change out of all receivers – over 5,000 units. With a lower error rate, we can increase savings during times of high demand for electricity. These savings are then passed on to our members.

Daniel Carlisle
President/CEO